Category Archives: Ocean sediment

Richey et al 2007 and Cariaco

A recent study, Richey et al 2007, showed a warm MWP in the Pigmy Basin, Gulf of Mexico. Julie Richey made an effective presentation at the AGU Session showing an elevated MWP from her foram studies and, together with Alicia Newton who made a similar presentation, had Mann gnashing his teeth. In a chat afterwards, […]

David Black, Cariaco and Prompt Archiving

David Black and associates have just (Oct 2007) published a new paper showing a reconstruction of SST from Cariaco sediments using Mg-Ca for the period 1221-1990 (thanks to Eduardo Zorita for alerting me to the study.) In this case, I am happily able to report that the relevant data was archived at WDCP contemporary with […]

A Coarse Fraction Bias in Arabian Sea G Bulloides?

In our recent discussion of the Arabian Sea G Bulloides series, I noticed a remarkable increase in the coarse fraction percentage in the top 1.3 cm of the critical RC2730 core. Willis has also commented on this. In core 2730, there is a correlation of 0.91 between the fraction of coarse particles and the percentage […]

The Arabian Splice

One of the reasons why scientists have been so quick to use tree ring information despite all the problems is that, for the most part, there is excellent dating control on tree ring chronologies, something which can be problematic in other proxies. Today I want to document some notes on dating the Arabian Sea G […]

Another Oceanic MWP Proxy

I’ve been going through the literature and data on ocean sediments looking for proxies with high resolution in the Holocene – something that I discussed a few months ago. Kim et al 2004 and Lorenz et al 2006, two articles by the same group, discuss Holocene SST changes based on alkenones. Most of their proxies […]

Gulf of Mexico SST Proxy

Here’s an interesting SST proxy from the Gulf of Mexico that I meant to report on last October, but is actually more timely now given our recent discussion of hurricanes. When I corresponded with Lloyd Keigwin around the time of the Juckes submission, he mentioned a “beautiful” unpublished high resolution core from Poore in the […]

Warm Pool and the Arabian Sea

It’s a dangerous practice to let your eye get teased into visual comparisons, but I was struck by a comparison between the G Bulloides series from the Arabian Sea (which is an upwelling proxy) and Stott’s Warm Pool SST proxies.

The Team versus Stott et al 2004

The Team (at both realclimate and NOAA) have stated in the strongest possible terms that the Holocene Optimum was restricted to summer in the NH extratropics. Reviewing their positions, realclimate here The [Holocene Optimum] is a somewhat outdated term used to refer to a sub-interval of the Holocene period from 5000-7000 years ago during which […]

The MWP in the Warm Pool

You may recall Hansen’s strange splice of modern instrumental records with a Mg/Ca SST proxy ending in 4320 BP based on a partially dissolved core.’ A couple of months ago, I mentioned a new paper by Newton et al (including L Stott) with a high Warm Pool MWP and briefly discussed Netwon’s presentation at AGU […]

Juckes and the David Black Condemnation

I’ve written on several occasions about Juckes’ use of cold water G Bulloides as a supposed temperature proxy (following Moberg’s equally indefensible use of this proxy.) It has come to my attention that a leading specialist, David Black of the University of Akron, had already issued a scathing denunciation of Juckes’ use of G Bulloides […]

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